Home / 518,839.56-715,999.77-289,391.13

Finding the Fourth Proportional to 518,839.56, 715,999.77 and 289,391.13

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Solution

The fourth proportional to 518,839.56, 715,999.77 and 289,391.13 is: 399,360.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,839.56 : 715,999.77 = 289,391.13 : x
  2. Step 2: Convert to fraction form
    518,839.56/715,999.77 = 289,391.13/x
  3. Step 3: Cross multiply
    518,839.56x = 715,999.77 × 289,391.13
  4. Step 4: Simplify right side
    518,839.56x = 207,203,982,520.04
  5. Step 5: Solve for x
    x = 207,203,982,520.04/518,839.56
  6. Step 6: Final answer
    x = 399,360.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.